2026-01-27 07:19.39: New job: test ocsigen/lwt https://github.com/ocsigen/lwt.git#refs/heads/fix-datarace-1026 (141d187d1113a0348399c4ced37d9dcc82b7f11d) (linux-x86_64:ubuntu-25.04-4.14_opam-2.5) Base: ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14 Opam project build To reproduce locally: git clone --recursive "https://github.com/ocsigen/lwt.git" -b "fix-datarace-1026" && cd "lwt" && git reset --hard 141d187d cat > Dockerfile <<'END-OF-DOCKERFILE' FROM ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14 # ubuntu-25.04-4.14_opam-2.5 USER 1000:1000 ENV CLICOLOR_FORCE="1" ENV OPAMCOLOR="always" WORKDIR /src RUN sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam RUN opam init --reinit -ni RUN uname -rs && opam exec -- ocaml -version && opam --version WORKDIR /src RUN sudo chown opam /src RUN cd ~/opam-repository && (git cat-file -e 873cb18c37b308713d11ad3894c4bb78d73fb3e7 || git fetch origin master) && git reset -q --hard 873cb18c37b308713d11ad3894c4bb78d73fb3e7 && git log --no-decorate -n1 --oneline && opam update -u COPY --chown=1000:1000 lwt_runtime_events.opam lwt_retry.opam lwt_react.opam lwt_ppx__ppx_let_tests.opam lwt_ppx.opam lwt_direct.opam lwt.opam ./ RUN opam pin add -yn lwt_runtime_events.dev './' && \ opam pin add -yn lwt_retry.dev './' && \ opam pin add -yn lwt_react.dev './' && \ opam pin add -yn lwt_ppx__ppx_let_tests.dev './' && \ opam pin add -yn lwt_ppx.dev './' && \ opam pin add -yn lwt_direct.dev './' && \ opam pin add -yn lwt.dev './' RUN echo '(lang dune 3.0)' > './dune-project' ENV DEPS="base-bigarray.base base-bytes.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.21.0 dune-configurator.3.21.0 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-compiler-libs.v0.12.4 ocaml-config.2 ocaml-options-vanilla.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 ppx_derivers.1.2.1 ppxlib.0.37.0 react.1.2.2 sexplib0.v0.17.0 stdlib-shims.0.3.0 topkg.1.1.1" ENV CI="true" ENV OCAMLCI="true" RUN opam update --depexts && opam install --cli=2.5 --depext-only -y lwt_retry.dev lwt_react.dev lwt_ppx.dev lwt.dev $DEPS RUN opam install $DEPS COPY --chown=1000:1000 . /src RUN opam exec -- dune build --only-packages=lwt_retry,lwt_react,lwt_ppx,lwt @install @check @runtest && rm -rf _build END-OF-DOCKERFILE docker build . END-REPRO-BLOCK 2026-01-27 07:19.39: Using cache hint "ocsigen/lwt-ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14-ubuntu-25.04-4.14_opam-2.5-f80664a0fc43791440912ae83095cdb3" 2026-01-27 07:19.39: Using OBuilder spec: ((from ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14) (comment ubuntu-25.04-4.14_opam-2.5) (user (uid 1000) (gid 1000)) (env CLICOLOR_FORCE 1) (env OPAMCOLOR always) (workdir /src) (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam")) (run (shell "opam init --reinit -ni")) (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) (workdir /src) (run (shell "sudo chown opam /src")) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "cd ~/opam-repository && (git cat-file -e 873cb18c37b308713d11ad3894c4bb78d73fb3e7 || git fetch origin master) && git reset -q --hard 873cb18c37b308713d11ad3894c4bb78d73fb3e7 && git log --no-decorate -n1 --oneline && opam update -u")) (copy (src lwt_runtime_events.opam lwt_retry.opam lwt_react.opam lwt_ppx__ppx_let_tests.opam lwt_ppx.opam lwt_direct.opam lwt.opam) (dst ./)) (run (network host) (shell "opam pin add -yn lwt_runtime_events.dev './' && \ \nopam pin add -yn lwt_retry.dev './' && \ \nopam pin add -yn lwt_react.dev './' && \ \nopam pin add -yn lwt_ppx__ppx_let_tests.dev './' && \ \nopam pin add -yn lwt_ppx.dev './' && \ \nopam pin add -yn lwt_direct.dev './' && \ \nopam pin add -yn lwt.dev './'")) (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) (env DEPS "base-bigarray.base base-bytes.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.21.0 dune-configurator.3.21.0 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-compiler-libs.v0.12.4 ocaml-config.2 ocaml-options-vanilla.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 ppx_derivers.1.2.1 ppxlib.0.37.0 react.1.2.2 sexplib0.v0.17.0 stdlib-shims.0.3.0 topkg.1.1.1") (env CI true) (env OCAMLCI true) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam update --depexts && opam install --cli=2.5 --depext-only -y lwt_retry.dev lwt_react.dev lwt_ppx.dev lwt.dev $DEPS")) (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam install $DEPS")) (copy (src .) (dst /src)) (run (shell "opam exec -- dune build --only-packages=lwt_retry,lwt_react,lwt_ppx,lwt @install @check @runtest && rm -rf _build")) ) 2026-01-27 07:19.39: Waiting for resource in pool OCluster 2026-01-27 07:20.05: Waiting for worker… 2026-01-27 07:23.04: Got resource from pool OCluster Building on odawa.caelum.ci.dev All commits already cached HEAD is now at 141d187d1 lwt_unix_stubs.c: fix races reported by TSan (from ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14) Unable to find image 'ocaml/opam:ubuntu-25.04-ocaml-4.14@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14' locally docker.io/ocaml/opam@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14: Pulling from ocaml/opam c62190a9ab61: Pulling fs layer 40711a051401: Pulling fs layer c085f5ff2319: Pulling fs layer 412ed4068436: Pulling fs layer 2f55881e7c17: Pulling fs layer 208628d88256: Pulling fs layer 15e39b9245ec: 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2e070f5cd521: Waiting d7bb015da553: Pulling fs layer 9d41ae5c57e0: Pulling fs layer 07aa22141608: Waiting d7bb015da553: Waiting 94b1b55e95dc: Waiting 85a0ef716932: Pulling fs layer 9d41ae5c57e0: Waiting ca92d3abca91: Pulling fs layer e8a350942cff: Pulling fs layer 85a0ef716932: Waiting a308a5ee6283: Pulling fs layer ca92d3abca91: Waiting e8a350942cff: Waiting 902174a11eba: Pulling fs layer a308a5ee6283: Waiting 2f1e88d133e2: Pulling fs layer e5494899f718: Pulling fs layer 902174a11eba: Waiting 4bdfe959d160: Pulling fs layer e5494899f718: Waiting 07634e87d0e8: Pulling fs layer cb0f432311ea: Pulling fs layer 4bdfe959d160: Waiting 49552e721ed7: Pulling fs layer 37b0c9e8febd: Pulling fs layer bb37d1c599f3: Pulling fs layer 37b0c9e8febd: Waiting cb0f432311ea: Waiting 07634e87d0e8: Waiting d8558bdd35b8: Pulling fs layer 49552e721ed7: Waiting bb37d1c599f3: Waiting c14f5ad6c755: Pulling fs layer 5b2edbf5da17: Pulling fs layer c14f5ad6c755: Waiting d8558bdd35b8: Waiting 96a20d219a97: Pulling fs layer 5b2edbf5da17: Waiting 96a20d219a97: Waiting c085f5ff2319: Verifying Checksum c085f5ff2319: Download complete 40711a051401: Download complete c62190a9ab61: Verifying Checksum c62190a9ab61: Download complete 2f55881e7c17: Verifying Checksum 2f55881e7c17: Download complete 15e39b9245ec: Verifying Checksum 15e39b9245ec: Download complete c62190a9ab61: Pull complete 40711a051401: Pull complete c085f5ff2319: Pull complete dd37ca65b191: Verifying Checksum dd37ca65b191: Download complete 6eed2619f1f0: Verifying Checksum 6eed2619f1f0: Download complete 220a6634738b: Verifying Checksum 220a6634738b: Download complete 5ae888d7638a: Verifying Checksum 5ae888d7638a: Download complete 412ed4068436: Verifying Checksum 412ed4068436: Download complete 99610966bbbb: Verifying Checksum 99610966bbbb: Download complete 412ed4068436: Pull complete 2f55881e7c17: Pull complete 98b09a045b22: Verifying Checksum 98b09a045b22: Download complete 2c04c9e7274a: Verifying Checksum 2c04c9e7274a: Download 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ocaml/opam@sha256:863dda63d8d9d4b752c550777d3338cee2095ba25ff8114fc5688b1917f69f14 2026-01-27 07:38.39 ---> using "a087cecdfee3c27a6dfd3b374223c58ceb06bb9197e0c5bfa09038c2912fa098" from cache /: (comment ubuntu-25.04-4.14_opam-2.5) /: (user (uid 1000) (gid 1000)) /: (env CLICOLOR_FORCE 1) /: (env OPAMCOLOR always) /: (workdir /src) /src: (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam")) 2026-01-27 07:38.39 ---> using "6628fbaea287be085c1f69116897fa244551695563234cf2a0f2968080bfffcf" from cache /src: (run (shell "opam init --reinit -ni")) Configuring from /home/opam/.opamrc and then from built-in defaults. Checking for available remotes: rsync and local, git. - you won't be able to use mercurial repositories unless you install the hg command on your system. - you won't be able to use darcs repositories unless you install the darcs command on your system. This version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted. You may want to back it up before going further. Continue? [Y/n] y Format upgrade done. <><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><> [default] Initialised 2026-01-27 07:38.39 ---> using "43b1664771e209c70664e1c4d4aa5215ea00316c213140908fe7d3a3067627b7" from cache /src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) Linux 6.8.0-87-generic The OCaml toplevel, version 4.14.2 2.5.0 2026-01-27 07:38.39 ---> using "e35201de726e6dcd60ed7658644b5fcf073701a2f448ca0d0784cb8c684ccdfa" from cache /src: (workdir /src) /src: (run (shell "sudo chown opam /src")) 2026-01-27 07:38.39 ---> using "535b3512bf68b6720e90bebbd91312926b30294524d6e2ff60bb8bd88cd1b86d" from cache /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "cd ~/opam-repository && (git cat-file -e 873cb18c37b308713d11ad3894c4bb78d73fb3e7 || git fetch origin master) && git reset -q --hard 873cb18c37b308713d11ad3894c4bb78d73fb3e7 && git log --no-decorate -n1 --oneline && opam update -u")) 873cb18c37 Merge pull request #29216 from shonfeder/release-dune-3.21.0 <><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><> [default] synchronised from git+file:///home/opam/opam-repository Everything as up-to-date as possible (run with --verbose to show unavailable upgrades). However, you may "opam upgrade" these packages explicitly at these versions (e.g. "opam upgrade ocaml.5.4.0"), which will ask permission to downgrade or uninstall the conflicting packages. Nothing to do. # To update the current shell environment, run: eval $(opam env) 2026-01-27 07:38.39 ---> using "6083635e3d777ee134de196f4de170dc5d91d1e6ca4145471335a3aa16176a64" from cache /src: (copy (src lwt_runtime_events.opam lwt_retry.opam lwt_react.opam lwt_ppx__ppx_let_tests.opam lwt_ppx.opam lwt_direct.opam lwt.opam) (dst ./)) 2026-01-27 07:38.39 ---> using "c4cd013c207654173699819423b544243f8db2ef0ed8987d52c4767791007092" from cache /src: (run (network host) (shell "opam pin add -yn lwt_runtime_events.dev './' && \ \nopam pin add -yn lwt_retry.dev './' && \ \nopam pin add -yn lwt_react.dev './' && \ \nopam pin add -yn lwt_ppx__ppx_let_tests.dev './' && \ \nopam pin add -yn lwt_ppx.dev './' && \ \nopam pin add -yn lwt_direct.dev './' && \ \nopam pin add -yn lwt.dev './'")) [lwt_runtime_events.dev] synchronised (file:///src) lwt_runtime_events is now pinned to file:///src (version dev) [lwt_retry.dev] synchronised (file:///src) lwt_retry is now pinned to file:///src (version dev) [lwt_react.dev] synchronised (file:///src) lwt_react is now pinned to file:///src (version dev) [NOTE] Package lwt_ppx__ppx_let_tests does not exist in opam repositories registered in the current switch. [lwt_ppx__ppx_let_tests.dev] synchronised (file:///src) [WARNING] Failed checks on lwt_ppx__ppx_let_tests package definition from source at file:///src: warning 62: License doesn't adhere to the SPDX standard, see https://spdx.org/licenses/ : "NOTFORRELEASE" lwt_ppx__ppx_let_tests is now pinned to file:///src (version dev) [lwt_ppx.dev] synchronised (file:///src) lwt_ppx is now pinned to file:///src (version dev) [lwt_direct.dev] synchronised (file:///src) lwt_direct is now pinned to file:///src (version dev) [lwt.dev] synchronised (file:///src) lwt is now pinned to file:///src (version dev) 2026-01-27 07:38.39 ---> using "9a0ee22167708389b2417875706857194be0cc8a07f376513e843920e35dd850" from cache /src: (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) 2026-01-27 07:38.39 ---> using "ce51f1c21d6dee1a2f4602bdbb9a1d573c42c4bbeb1a523999c46344016e990d" from cache /src: (env DEPS "base-bigarray.base base-bytes.base base-threads.base base-unix.base cppo.1.8.0 csexp.1.5.2 dune.3.21.0 dune-configurator.3.21.0 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-compiler-libs.v0.12.4 ocaml-config.2 ocaml-options-vanilla.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ocplib-endian.1.2 ppx_derivers.1.2.1 ppxlib.0.37.0 react.1.2.2 sexplib0.v0.17.0 stdlib-shims.0.3.0 topkg.1.1.1") /src: (env CI true) /src: (env OCAMLCI true) /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam update --depexts && opam install --cli=2.5 --depext-only -y lwt_retry.dev lwt_react.dev lwt_ppx.dev lwt.dev $DEPS")) + /usr/bin/sudo "apt-get" "update" - Get:1 http://security.ubuntu.com/ubuntu plucky-security InRelease [126 kB] - Get:2 http://security.ubuntu.com/ubuntu plucky-security/restricted amd64 Packages [330 kB] - Get:3 http://security.ubuntu.com/ubuntu plucky-security/main amd64 Packages [290 kB] - Get:4 http://security.ubuntu.com/ubuntu plucky-security/universe amd64 Packages [233 kB] - Hit:5 http://archive.ubuntu.com/ubuntu plucky InRelease - Get:6 http://archive.ubuntu.com/ubuntu plucky-updates InRelease [126 kB] - Get:7 http://archive.ubuntu.com/ubuntu plucky-backports InRelease [126 kB] - Get:8 http://archive.ubuntu.com/ubuntu plucky-updates/restricted amd64 Packages [363 kB] - Get:9 http://archive.ubuntu.com/ubuntu plucky-updates/universe amd64 Packages [325 kB] - Get:10 http://archive.ubuntu.com/ubuntu plucky-updates/main amd64 Packages [452 kB] - Fetched 2371 kB in 1s (2598 kB/s) - Reading package lists... - <><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><> [lwt.dev] synchronised (file:///src) [lwt_ppx.dev] synchronised (file:///src) [lwt_react.dev] synchronised (file:///src) [lwt_retry.dev] synchronised (file:///src) [NOTE] Package ocaml-options-vanilla is already installed (current version is 1). [NOTE] Package ocaml-config is already installed (current version is 2). [NOTE] Package ocaml-base-compiler is already installed (current version is 4.14.2). [NOTE] Package ocaml is already installed (current version is 4.14.2). [NOTE] Package base-unix is already installed (current version is base). [NOTE] Package base-threads is already installed (current version is base). [NOTE] Package base-bigarray is already installed (current version is base). # To update the current shell environment, run: eval $(opam env) 2026-01-27 07:38.39 ---> using "b6264826e02cb11cdeaf00cc3f913aa690bb8b0d3229d54139b2cb0f6f49828d" from cache /src: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam install $DEPS")) [NOTE] Package ocaml-options-vanilla is already installed (current version is 1). [NOTE] Package ocaml-config is already installed (current version is 2). [NOTE] Package ocaml-base-compiler is already installed (current version is 4.14.2). [NOTE] Package ocaml is already installed (current version is 4.14.2). [NOTE] Package base-unix is already installed (current version is base). [NOTE] Package base-threads is already installed (current version is base). [NOTE] Package base-bigarray is already installed (current version is base). The following actions will be performed: === install 15 packages - install base-bytes base - install cppo 1.8.0 - install csexp 1.5.2 - install dune 3.21.0 - install dune-configurator 3.21.0 - install ocaml-compiler-libs v0.12.4 - install ocamlbuild 0.16.1 - install ocamlfind 1.9.8 - install ocplib-endian 1.2 - install ppx_derivers 1.2.1 - install ppxlib 0.37.0 - install react 1.2.2 - install sexplib0 v0.17.0 - install stdlib-shims 0.3.0 - install topkg 1.1.1 <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> -> retrieved cppo.1.8.0 (cached) -> retrieved csexp.1.5.2 (cached) -> retrieved ocaml-compiler-libs.v0.12.4 (cached) -> retrieved ocamlbuild.0.16.1 (cached) -> retrieved ocamlfind.1.9.8 (cached) -> retrieved ocplib-endian.1.2 (cached) -> retrieved ppx_derivers.1.2.1 (cached) -> retrieved react.1.2.2 (cached) -> retrieved sexplib0.v0.17.0 (cached) -> retrieved stdlib-shims.0.3.0 (cached) -> retrieved topkg.1.1.1 (cached) -> retrieved dune.3.21.0, dune-configurator.3.21.0 (cached) -> retrieved ppxlib.0.37.0 (cached) -> installed ocamlbuild.0.16.1 -> installed ocamlfind.1.9.8 -> installed base-bytes.base -> installed topkg.1.1.1 -> installed react.1.2.2 -> installed dune.3.21.0 -> installed ppx_derivers.1.2.1 -> installed csexp.1.5.2 -> installed cppo.1.8.0 -> installed ocaml-compiler-libs.v0.12.4 -> installed sexplib0.v0.17.0 -> installed stdlib-shims.0.3.0 -> installed ocplib-endian.1.2 -> installed dune-configurator.3.21.0 -> installed ppxlib.0.37.0 Done. # To update the current shell environment, run: eval $(opam env) 2026-01-27 07:38.39 ---> using "d3d8897120587e0e113003b8e564236acd79c42d4a00a6d1e4a8ffea299e2433" from cache /src: (copy (src .) (dst /src)) 2026-01-27 07:38.39 ---> saved as "b41439f6d405c0f50acb73fc381ab631de30373af6d6120294d405d8cf24a897" /src: (run (shell "opam exec -- dune build --only-packages=lwt_retry,lwt_react,lwt_ppx,lwt @install @check @runtest && rm -rf _build")) (cd _build/default/test/retry && ./main.exe) Testing library 'retry'... .............. Ok. 14 tests ran, 0 tests skipped in 0.01 seconds (cd _build/default/test/core && ./main.exe) Testing library 'core'... ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................SSSSSSSSSSSSSSSSSSSSSSS.................................................................................................................................................. Ok. 705 tests ran, 23 tests skipped in 0.14 seconds (cd _build/default/test/ppx && ./main.exe) Testing library 'ppx'... ................ Ok. 16 tests ran, 0 tests skipped in 1.20 seconds (cd _build/default/test/react && ./main.exe) Testing library 'react'... ........... Ok. 11 tests ran, 0 tests skipped in 4.50 seconds (cd _build/default/test/unix && ./main.exe) Testing library 'unix'... .................................SSSSS..............................................................................................................SSSS................................................................................... Ok. 226 tests ran, 9 tests skipped in 6.28 seconds 2026-01-27 07:38.47 ---> saved as "458ad5dccf9deb5cd2d2d14752f9acdf6445445c7dbd03daf21beb967e8fef5c" Job succeeded 2026-01-27 07:38.47: Job succeeded